input {
	text-decoration: none;
	position: absolute;
	left: 50%;
	top: 68%;
	transform: translate(-50%, -50%);
	font-size: 50px;
	font-family: STXingkai;
	background: linear-gradient(90deg, #03a9f4, #f441a5, #ffeb3b, #03a9f4);
	background-size: 400%;
	width: 400px;
	height: 100px;
	color: #fff;
	line-height: 100px;
	text-align: center;
	text-transform: uppercase;
	border-radius: 50px;
	z-index: 1;
}

input::before {
	content: "";
	position: absolute;
	left: -5px;
	right: -5px;
	top: -5px;
	bottom: -5px;
	background: linear-gradient(90deg, #03a9f4, #f441a5, #ffeb3b, #03a9f4);
	background-size: 400%;
	border-radius: 50px;
	filter: blur(20px);
	z-index: -1;
}

input:hover::before {
	animation: sun 8s infinite;
}

input:hover {
	animation: sun 8s infinite;
}

@keyframes sun {
	100% {
		background-position: -400% 0;
	}
}